Pillow Fight Day 2014

Young people participate in a pillow fight to mark the International Pillow Fight Day in Budapest, Hungary, Saturday, April 5, 2014.

MTI, Bea Kallos/AP Photo

Young people participate in a pillow fight to mark the International Pillow Fight Day in Budapest, Hungary, Saturday, April 5, 2014.

MTI, Bea Kallos/AP Photo

Revellers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day on April 5, 2014 in London.

Rob Stothard/Getty Images

Revellers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day on April 5, 2014 in London.

Rob Stothard/Getty Images

Alex Plunkett (left) and Sean Hart (right) both of Arlington, Virginia take part in a massive pillow fight on the National Mall in Washington on April 5, 2014.

Marvin Joseph/The Washington Post/Getty Images

Massive pillow fights breakout in cities around the world including the National Mall in Washington on April 5, 2014.

Marvin Joseph/The Washington Post/Getty Images

Nearly 5,000 Americans gather at Washington Square Park to take part in a giant pillow fight during the International Pillow Fight Day on April 5, 2014 in New York.

Cem Ozdel/Anadolu Agency/Getty Images

Revellers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day on April 5, 2014 in London. Pillow fights have been organised in numerous other cities around the world simultaneously.

Rob Stothard/Getty Images

Youngsters engage in a pillow fight in Bucharest, Romania, Saturday, April 5, 2014. People gathered for a flashmob event in Bucharest, along with people in other cities worldwide on Saturday, for a pillow fight to mark the International Pillow Fight Day.

Vadim Ghirda/AP Photo

People take part in a pillow fight day at Haji Lane on April 5, 2014 in Singapore.